Hot water boiler with incline type firebox

ABSTRACT

A hot-water boiler with an incline type firebox is proposed. In the hot-water boiler, a fire tube connector of the firebox is inclined to be deeper from an end of a firebox side to a central portion thereof, thus reducing vortices that may be generated by hot air and flames supplied from a burner.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No. 10-2018-0145966, filed Nov. 23, 2018, the entire contents of which are incorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a hot-water boiler with an incline type firebox. More particularly, the invention relates to a hot-water storage type boiler with an inclined firebox, in which a fire tube connector of the firebox is inclined to be deeper from an end of a firebox side to a central portion thereof, thus reducing vortices that may be generated by hot air and flames supplied from a burner.

Description of the Related Art

Generally, a gas boiler is used to heat a space using gas as fuel and water as a heating medium. Particularly, a combined gas and hot water boiler is a combustor that may also use hot water by circulating heating circulation water via a three-way valve in the boiler and heating supplied water through an indirect heat exchange.

The gas boiler is classified into an instantaneous boiler and a hot-water storage type boiler according to a hot-water supply method. Here, the hot-water storage type boiler is designed such that hot water is separately stored in a hot-water storage tank to be immediately used when necessary, unlike the instantaneous boiler that operates a burner to make hot water when necessary.

FIG. 1 is a diagram showing the configuration of a general hot-water storage type boiler having a burner at a lower position. Reference numeral 10 denotes the hot-water storage type boiler.

Referring to FIG. 1, the general hot-water storage type boiler 10 includes a boiler body 12, and a heat exchange unit 14, a heating unit 20, an intake unit 18 having an air blower, and an exhaust unit 19, which are accommodated in the boiler body 12.

The heat exchange unit 14 includes a plurality of fire tubes 15 which are connected to the heating unit 20 and are configured to traverse a space of a water tank 16 storing supplied water, thus performing a heat exchange operation by moving air (hereinafter referred to as “hot air”) heated by the heating unit 20 and transferring heat to the supplied water.

Water of the water tank 16 is supplied through a direct water supply unit (not shown), and is supplied through a hot water pipe (not shown) to an outside by a circulation pump (not shown) or the like.

The heating unit 20 includes a furnace 21 that defines a firebox 22, and a burner 30 that jets flames produced by mixing combustion gas with outside air into the furnace.

The flames jetted from the burner 30 heat supplied air to produce hot air and thereby heat the fire tubes 15.

The furnace 21 faces the burner 30 to directly and indirectly heat the air with the flames produced by the burner 30, and includes a fire tube connector 21 a to which the fire tubes 15 are connected.

As shown in FIG. 1, the fire tube connector 21 a may have various shapes including a circular shape depending on the shape of the boiler body 12 or the water tank 16. The fire tube connector is configured to be flat and includes a plurality of coupling holes 23 to be connected to the fire tubes 15.

The fire tube connector 21 a transfers heat to the fire tubes 15 while being heated by collision with the flames produced from the burner 30 and the hot air heated by the flames, transfers the hot air to inner conduits of the fire tubes 15, and transfers the heat to the fire tubes. Since the fire tube connector 21 a is configured to be flat, and collides perpendicularly with the hot air and the flames to produce vortices.

As described above, the general hot-water storage type boiler is problematic in that the vortices are produced due to the perpendicular collision between the fire tube connector 21 a of the furnace 21 and the hot air or flames, so that heat loss is increased and a pressure loss in the firebox is increased, thus undesirably increasing a load on the air blower of the intake unit.

Furthermore, the general hot-water storage type boiler is problematic in that its outer diameter should be large to compensate for the heat loss occurring in the firebox, thus negatively affecting the design of the boiler.

DOCUMENTS OF RELATED ART

(Patent Document 1) KR Patent No. 10-290808

(Patent Document 2) KR UM Registration No. 20-0206391

SUMMARY OF THE INVENTION

The present invention has been made in order to solve the above-mentioned problems in the prior art and an object of the present disclosure is to provide a hot-water storage type boiler with an inclined firebox, in which a fire tube connector of the firebox is inclined to be deeper from an end of a firebox side to a central portion thereof, thus reducing vortices that may be generated by heat and flames supplied from a burner.

In order to achieve the object of the present invention, the invention provides a hot-water storage type boiler with an inclined firebox, the boiler including a housing including a housing body that defines a space therein and is open at both sides thereof, and a housing bottom part that is provided on a first side thereof and has a plurality of coupling holes; a water tank provided in the space of the housing and supplied with direct water to store the water; a plurality of fire tubes traversing the water tank, and coupled at first ends thereof to coupling holes of the housing bottom part; a heating unit including a furnace provided on a second side of both sides of the housing and having on a first side of both sides of the water tank provided in the space a fire tube connector to which second ends of the fire tubes are connected, thus defining a firebox, and a burner provided to face the fire tube connector to inject air and flames into the firebox; and an exhaust unit provided on a second side of both sides of the water tank having the heating unit, and exhausting combustion gas fed from the firebox through the fire tubes and the coupling holes of the housing bottom part and exhaust air that has undergone a heat exchange process in the fire tubes, wherein the fire tube connector is inclined to be deeper from an outside to a central portion.

The housing bottom part may be inclined to be deeper from an outside to a central portion so as to correspond to the fire tube connector.

The fire tubes may be formed such that lengths thereof may be reduced from the outside to the central portion depending on an inclination of the fire tube connector.

The central portion of the fire tube connector may be formed to be horizontal in a predetermined area.

The fire tube connector may be formed to have any one of a circular shape, a square shape, a hexagonal shape, and an octagonal shape, depending on a shape of the housing, and the central portion may be of any shape to maintain the inclination.

The housing may be opened at upper and lower portions thereof, the furnace may be provided on the upper portion of the housing so that the firebox faces upwards, and the burner may be provided on an upper portion of the furnace to spray the flames and the air towards the fire tube connector of the furnace.

The present invention provides a hot-water storage type boiler with an inclined firebox, in which a fire tube connector of a furnace forming a lower surface or an upper surface of a firebox is inclined to be deeper towards a central portion thereof, thus minimizing vortices that may be generated by hot air and flames produced by a burner, and consequently preventing a heat loss in the firebox.

Furthermore, the present invention provides a hot-water storage type boiler with an inclined firebox, which minimizes the generation of vortices and minimizes a heat loss, thus allowing an outer diameter of a furnace to be reduced and consequently making it easy to design the boiler.

Furthermore, the present invention provides a hot-water storage type boiler with an inclined firebox, which can reduce a pressure loss in a firebox by minimizing vortices, thus reducing a load on an air blower and utilizing a using region to the maximum.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating the configuration of a general hot-water storage type boiler;

FIG. 2 is a diagram illustrating the configuration of a hot-water storage type boiler according to the present invention;

FIG. 3 is a perspective view illustrating the configuration of a boiler body of the hot-water storage type boiler according to the present invention;

FIG. 4 is a vertical cutaway perspective view illustrating the boiler body of the hot-water storage type boiler according to the present invention;

FIG. 5 is a vertical cutaway front view illustrating the boiler body of the hot-water storage type boiler according to the present invention;

FIG. 6 is a front view illustrating the configuration of a fire tube connector of a furnace of the boiler body and a bottom part of the boiler body of the hot-water storage type boiler according to the present invention; and

FIG. 7 is a view illustrating various shapes of a fire tube connector according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, the configuration and operation of a hot-water storage type boiler with an inclined firebox according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a diagram illustrating the configuration of a hot-water storage type boiler according to the present invention, FIG. 3 is a perspective view illustrating the configuration of a boiler body of the hot-water storage type boiler according to the present invention, and FIG. 4 is a vertical cutaway perspective view illustrating the boiler body of the hot-water storage type boiler according to the present invention. In the drawings, the boiler body and a housing have cylindrical shapes.

Referring to FIGS. 2 to 4, the hot-water storage type boiler 1000 includes a boiler body 100, a heating unit 800, a water tank 400, fire tubes 500, and an exhaust unit 700.

The boiler body 100 includes a housing 110, a top cover 116, a direct water supply unit 120, and a hot-water discharge unit 130.

The housing 110 includes a housing body 111 that defines a space therein and is open at both sides thereof, and a housing bottom part 112 that is provided on a side and has a plurality of coupling holes 223 so that the fire tubes 500 are inserted into and coupled to the corresponding holes.

The housing bottom part 112 may be flat or may be inclined to be deeper towards a central portion thereof in the same manner as a fire tube connector 220 that will be described below.

According to an embodiment, the housing bottom part 112 may be provided on a bottom part of the housing 110 as defined by the term, or may be provided on a top part of the housing 110 unlike the term.

The top cover 116 is configured to cover the open top of the housing body 111, and the heating unit 800 passes from an outside to an inside of the housing body 111 to be connected thereto. If the housing bottom part 112 is located at an upper position, the top cover 116 may be configured to cover the open bottom of the housing body 111.

The direct water supply unit 120 passes through the housing body 111 and is connected to the water tank 400 provided in the space in the housing body 111 to supply direct water fed from the outside to the water tank 400.

The hot-water discharge unit 130 discharges hot water, heated through a heat exchange process with hot air flowing from the water tank 400 to the fire tubes 500, to the outside.

The heating unit 800 includes a furnace 200 and a burner 300.

As shown in FIGS. 3 and 4, the furnace 200 is opened at a top, and is inserted into an upper portion of the housing body 111 to define the firebox 201. The firebox 201 means a space defined by the furnace 200.

The furnace 200 includes a furnace side 210 that is formed along an inner surface of the housing body 110, and the fire tube connector 220 that is connected to an end of the furnace side 210 and includes a plurality of coupling holes 223 to which the fire tubes 500 are coupled.

According to the present invention, the fire tube connector 220 is inclined to be deeper towards the central portion thereof. The detailed configuration of the fire tube connector 220 and the housing bottom part 112 will be described below in detail with reference to FIGS. 5 to 7.

The upper portion of the furnace 200 is covered by the top cover 116 excluding the burner 300, and the burner 300 is provided in a penetrated portion of the cover 116.

The burner 300 is connected to an air supply unit 310, and is provided with an air blower 320. As the air blower 320 is driven, air is sucked through the air supply unit 310. When the burner is ignited, the sucked air, the combustion gas, and the flames are injected into the firebox 201 of the furnace 200.

The air is heated by the flames injected from the burner 300, and the hot air that is the heated air and the flames heat the fire tube connector 220 of the furnace 200 and the fire tubes 500, and the combustion gas produced when the hot air and the flames of the burner 300 are produced heats the fire tubes 500 while moving along the fire tubes 500. In other words, the hot air heated by the burner 300 flows along the inclined fire tube connector 220 through the fire tubes 500 to the exhaust unit 700 while being circulated in the firebox 201.

The water tank 400 is provided between the heating unit 800 and the exhaust unit 700. The plurality of fire tubes 500 connected to the fire tube connector 220 and the housing bottom part 112 passes through the water tank. The water tank is supplied with direct water through the direct water supply unit 120, generates hot water by heating the direct water with heat produced from the fire tubes 500, and discharges the generated hot water through the hot-water discharge unit 130.

The exhaust unit 700 is provided on an opposite side of the housing body 110 on which the heating unit 800 is provided, receives the hot air and the combustion gas produced by the heating unit 800 through the fire tubes 500, and is discharged to the outside through the exhaust pipe 710.

That is, the exhaust unit 700 is configured to come into contact with the housing bottom part 112 of the housing body 110, receives the hot air and the combustion gas from the fire tubes 500 connected to the coupling holes 223 of the housing bottom part 112, and then discharges the hot air and the combustion gas through the exhaust pipe 710.

FIG. 5 is a vertical cutaway front view illustrating the boiler body of the hot-water storage type boiler according to the present invention, FIG. 6 is a front view illustrating the configuration of the fire tube connector of the furnace of the boiler body and the bottom part of the boiler body of the hot-water storage type boiler according to the present invention, and FIG. 7 is a view illustrating various shapes of the fire tube connector according to an embodiment of the present invention. Hereinafter, the configuration of the housing bottom part 112 and the fire tube connector 220 will be described in detail with reference to FIGS. 5 to 7. Here, the fire tube connector 220 will be mainly described.

As shown in FIG. 6, the fire tube connector 220 includes a central portion 221, and an inclined portion 222 that is inclined to be deeper from an end of the furnace side 210 to the central portion 221. The inclined portion 222 includes the coupling holes 223 so that the plurality of fire tubes 500 is inserted into and coupled to the coupling holes. The central portion 221 may be in the form of a vertex, or may be formed as a flat area of a predetermined range. In the latter case, the coupling hole 223 may be formed even in the central portion 221.

As shown in FIG. 6, the housing bottom part 112 may be configured to include a central portion 113 and an inclined portion 114 in the same configuration as the fire tube connector 220, or may be configured to be flat.

As shown in FIG. 7, the fire tube connector 220 and the housing bottom part 112 may have the shape of squares 701 and 704, the shape of circles 702 and 705, or the shape of polygons 703 and 706 such as a hexagon or an octagon, depending on the shape of the housing body 110.

The central portion 221 of the fire tube connector 220 and the central portion 113 of the housing bottom part 112 may have the same shape as the fire tube connector 220 and the housing bottom part 112 as shown by reference numerals 701, 702, and 703 of FIG. 7, or may have a shape different from that of the fire tube connector and the housing bottom part as shown by reference numerals 704, 705, and 706 of FIG. 7.

Although the present invention was described with reference to specific embodiments shown in the drawings, it is apparent to those skilled in the art that the present invention may be changed and modified in various ways without departing from the scope of the present invention, which is described in the following claims. 

What is claimed is:
 1. A hot-water storage type boiler with an inclined firebox, the boiler comprising: a housing including a housing body that defines a space therein and is open at both sides thereof, and a housing bottom part that is provided on a first side thereof and has a plurality of coupling holes; a water tank provided in the space of the housing and supplied with direct water to store the water; a plurality of fire tubes traversing the water tank, and coupled at first ends thereof to coupling holes of the housing bottom part; a heating unit including a furnace provided on a second side of both sides of the housing and having on a first side of both sides of the water tank provided in the space a fire tube connector to which second ends of the fire tubes are connected, thus defining a firebox, and a burner provided to face the fire tube connector to inject air and flames into the firebox; and an exhaust unit provided on a second side of both sides of the water tank having the heating unit, and exhausting combustion gas fed from the firebox through the fire tubes and the coupling holes of the housing bottom part and exhaust air that has undergone a heat exchange process in the fire tubes, wherein the fire tube connector is inclined to be deeper from an outside to a central portion.
 2. The hot-water storage type boiler of claim 1, wherein the housing bottom part is inclined to be deeper from an outside to a central portion so as to correspond to the fire tube connector.
 3. The hot-water storage type boiler of claim 2, wherein the fire tubes are formed such that lengths thereof are reduced from the outside to the central portion depending on an inclination of the fire tube connector.
 4. The hot-water storage type boiler of claim 2, wherein the central portion of the fire tube connector is formed to be horizontal in a predetermined area.
 5. The hot-water storage type boiler of claim 2, wherein the fire tube connector is formed to have any one of a circular shape, a square shape, a hexagonal shape, and an octagonal shape, depending on a shape of the housing, and the central portion is of any shape to maintain the inclination.
 6. The hot-water storage type boiler of claim 2, wherein the housing is opened at upper and lower portions thereof, the furnace is provided on the upper portion of the housing so that the firebox faces upwards, and the burner is provided on an upper portion of the furnace to spray the flames and the air towards the fire tube connector of the furnace. 